| group | Proj. U | Proj. WS | Corr. U | Corr. WS | B | L | LCM | Pos. angle | r | MU | MP |
| 0.00 | 4.43 | 0.00 | 3.06 | -19.49 | 166.57 | -41.43 | 114.55 | 0.6941 | -363.8 | -368.7 | |
|
previous
or next observation for the same group /
back to the solar disc SDO HMI 2014-04-18 21:00:34 UT
See sunspots with tool (Click here to study sunspot positions and configurations with tool using white-light and magnetogram images and polarity drawing) (It is recommended to set high resolution on your display!) |
| spot | Proj. U | Proj. WS | Corr. U | Corr. WS | B | L | LCM | Pos. angle | r | MU | MP |
| 0.00 | 0.62 | 0.00 | 0.37 | -31.00 | 184.36 | -23.64 | 142.01 | 0.5605 | 464.0 | 517.7 | |
| 0.00 | 0.71 | 0.00 | 0.47 | -26.87 | 171.27 | -36.73 | 125.72 | 0.6594 | -438.0 | -414.2 | |
| 0.00 | 0.71 | 0.00 | 0.47 | -25.26 | 169.25 | -38.75 | 122.42 | 0.6729 | -602.0 | -501.8 | |
| 0.00 | 1.15 | 0.00 | 0.82 | -17.41 | 162.54 | -45.47 | 109.13 | 0.7222 | -552.0 | -429.9 | |
| 0.00 | 1.24 | 0.00 | 0.93 | -10.10 | 159.31 | -48.69 | 98.79 | 0.7506 | -691.0 | -577.9 | |
| Proj. U | - Projected umbra area in millionths of solar disc, negative values indicate | |
|
that the umbra consists of fragmented regions which cannot be separated without losing umbral area. In this way several spots (intensity minima in the umbra) have a common umbra, e.g. -2 means that the given spot shares an umbra with spot No.2, and the common U value is indicated at spot No.2. |
||
| Proj. WS | - Projected whole spot area in millionths of solar disc, negative values indicate | |
|
that several umbras have a common penumbra, e.g. -7 means that the given umbra shares a penumbra with umbra No.7, and the WS value is indicated at No.7. |
||
| Corr. U | - Corrected umbra area in millionths of solar hemisphere, for negative values see above | |
| Corr. WS | - Corrected whole spot area in millionths of solar hemisphere, for negative values see above | |
| B | - Heliographic latitude B; positive: North, negative: South | |
| L | - Heliographic longitude L | |
| LCM | - Longitudinal distance from the Sun's central meridian | |
| Pos. angle | - Position angle | |
| r | - Distance from the centre of Sun's disc in terms of Sun's radius | |
| MU | - Mean magnetic field within the umbra contour averaged the pixel values with sign. | |
| MP | - Mean magnetic field within the penumbra contour averaged the pixel values with sign. | |